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习题练习：Physics Unit17: Electric Potential
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 作者: admin  发布日期: 2022-08-15 14:49    总分: 75分  得分: _____________

答题人: 匿名未登录  开始时间: 22年08月15日 14:49  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the followiky;5*re,vg /ls )om88duuur c ng is not a vector?

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One joule per coulomb is a4bqjo.mn3l2 m jy,+ ec

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two identical aluminum objects are insulated from their surroundings. g2i0u+ ;orl+0c xeauzid.d )1(awow r Object A has a net charge of excess electrons. Object B is grounded. Whichdiaaoc 2il. u;r0(u)dw1r+g0x ew oz+ object is at a higher potential?

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For a proton moving in the direction of teyp)7e0: 1 d 9dmyvcckhe electric field

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  For an electron moving inh3oz5i u w9j*sp)h) 6 l.tqo3h3gf pln a direction opposite to the electric field

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Several electrons are placed on a hollow conducting spherets d;9(ls6 *1-od/j rgmiwyno,bc hn ,. They

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A small charged ball is accelerated frz 6g2 k/) /)f1qrelzequu c7ts79pvjxom rest to a speed v by a 500 V potential differexusuz z)t7p 1 eqj2lrec/ 9q fg6/vk)7nce. If the potential difference is changed to 2000 V, what will the new speed of the ball be?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A surface on which all points are at the same potential is referred to b3m/tu(0 qiw)v8irli a ,omi+as

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A negative charge is moved from point A to point B along an equipotentio3mjux82pim5xh:9fow p+ j 2p al surfac o:wm9 fix+p hoxjpjp8um2523e.

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10#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An equipotential surface mu1amnr7 hc:3n isf2+xlst be

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11#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The energy acquired by a particle carrying a charge equal to tham8/8 2lboo e)eg-jqxxt on the electron as a result of movinqx 8lb/o)8 -emex g2ojg through a potential difference of one volt is referred to as

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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The electron-volt isz **j; dvyb8ckj.y um- a unit of

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One electron-volt correspfq8p gid o* k o/ jgo9ps/z;b7y40fi:jonds to

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at a distance of 2.0 m from a positive point charge is eq8 ur+l 0pfk;5 kdxa4100 V. What is the absolute potential 4.0 m away from the sakx;puf4 e0q+8dalrk 5 me point charge?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potentialn0d)uk+ ym,xc1y z q.o-i d5za at a distance of 2.0 m from a negative point charge is -100 V. What is the absz5 u1aci qxdo,yzny 0-. )+dmkolute potential 4.0 m away from the same point charge?

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential jl6vg, w *jawug g,y:5at the exact center of a square is 3.0 V when a charge of +Q is located at onagy*v6,jwg u,jgl :w5 e of the square's corners. What is the absolute potential at the square's center when each of the other corners is also filled with a charge of +Q?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The absolute potential at the center of a square is 3.0 V when a caexx9w rwwfqj);a0o 5 zl8r;;0e cj+sharge of +Q is located at one of the square's corners. What ixca r0j q ;w;lz+0sjwr)ao9;8wfx5 ees the absolute potential at the square's center when a second
charge of -Q is placed at one of the remaining corners?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Electric dipoles always consist of two charges thns4bq*mrrvoo 7p*7e -yn snlth .4 4u0at are

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  One coulomb per volt isf e7jppys;l0p.g9d t o6 ef:j, a

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel-plate capacitors aactsf;t1*3no6 wq v.1kkr e5hre identical in every respect except that one has twice thva;wrk6n 3t 5.oks*1fqe tc1he plate area of the other. If the smaller capacitor has capacitance C, the larger one has capacitance

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor5q x/dw1)6na j ;0h hbb)w5ulxk4ddxk has a capacitance of C. If the area of the plates is dou 0 5h)x6dhkw ul5xabqdk;j1 )4bnxwd/bled and the distance between the plates is halved, what is the new capacitance?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A battery charges a parallel-platkzu,55vk . 4t6fmcuceg) q /zorl;m +qe capacitor fully and then is removed. The plates are immediately pulled apart. (With the battery disconnected, the amount of charge on th5klqmrt+o,c / ;m zv4kf)u u 65gzq.ece plates remains constant.) What happens to the potential difference between the plates as they are being separated?

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23#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the electric field between the plates of a given capacitor is weakenedafsh,8 2 x8znk, the capacitance of that capacitora 8zsfknx, 82h

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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintained with constant vobn75jmlts/g (f( ap9jltage by a battery as they are pulled apart. During this process, the amount of charge on the plagnal5 ( t(7bpfj j9/smtes must

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The plates of a parallel-plate capacitor are maintain ehzc, u8lpxueml817(i+u q9h ed with constant voltage by a battery as they are pulled apart. What happens to the strength of the electric lhuze uq8,+7el h9ip umc(1x 8field during this process?

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26#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State three reasons for adding a dielectric material between the plates of a c6 qyiz6 czky1lwjh/(8 apacitor.z ikzl6yy6 j1hq8(cw /
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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as paper is placed between the plates of a capacitor.j2*-;l m+a zq(p7xe5 q bbbyue What happens to the capaci(qp b-y mjeqaubz5xbl ;e*2 7+tance?

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A dielectric material such as paper is placed between th.4bvmw.x:w0e5l wq cqe plates of a capacitor holding a fixed lww.wc e : qbmx.q5v40charge. What happens to the electric field between the plates?

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is connec 3l4z6wljtbew cq.i8t n,h(k6ted to a battery and becomes fully charged. The capacitor is then disconnected, and the separation between the plates is increased in such a way that no charge leaks off. The energy stored inhi6l,wbt n (84l 3tce6.jzwkq this capacitor has

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the capacitance of a capacitor holding a constant charge causes the enczbh: :k:c 00bnbie. iergy stored in that capacitob::enz ibbc i00.h: kcr to

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Doubling the voltage across a given carzt5ix 697v9;1mkdzg ;euf ucpacitor causes the energy stored in that capacu e; 67ux;v5rd1ztfcmg9kz9 i itor to

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  It takes 50 J of energy to mof* ;uksm /z j,*klsyr(ve 10 C of charge from point A to point B. What is the;zky j */lsksum, rf*( potential difference between points A and B?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The net work done in moving an electron from point A, wp1w0)z+jrdpl4pe:t jhere the potential is -50 V, to point B, where the potentia:l) +0epj1pzpwrt j d4l is +50 V, is

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at rest, is accelerated through an e9cxgixo:6mamu 9r8k3,q b y.jlectric potential difference of 500 V. What is the kinetic energy of tqyc x u 96.iomgjx8,rmbk9 a3:he proton?

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton, initially at rest, is accelerated through an electric potential difo8ux.7bnn:f4 xp tdw:ference of 500 V. What is the speed of the tfpn84: .7xbndo: xwuproton?

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Starting from rest, a proton falls through a potential differen2 5lkr-c hpw r(0p3yvmce of 1200 V. What speed does it acquire?3pr vwlh0-cy25(kp m r

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much work does 9.0 V do in moqo*yjk k qzx k884l5vt4v(kk9ving $8.5 \times 10^{18} \; electrons$?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A stationary electro8 (9fsn ja+sosn is accelerated through a potential difference of 500 V. What is the velocity ossjs+9o 8fna (f the electron afterward?

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.0-g object carries a charge of 20 mC. The object is accelerated fr e55nmsh* zfwms4 ;nq7om rest through a potential difference, and afterwardm f seq;57n*sh 4zm5wn the ball is moving at 2.0 m/s. What is the magnitude of the potential difference?

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-V battery maintaobropxi ;.+gnn+; -p3 0stj 5ulapp7yins the electrical potential difference between two parallel metal plates separ7x0 i pjgn.np+; oorl-pu; pab3yt5 +sated by 1.0 mm. What is the electric field between the plates?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A uniform electric field e6b. e6dpyxt3, with a magnitude of 500 V/m, is directed parallel to the +x axis. If the potential at x = 5.0 m is 2500 V, what pe eb6d3yx6t.is the potential at x = 2.0 m?

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C diru hqa)h3v jj*9-t hek4ected toward the east. If the voltage measured relative jhjva)9q-h *eu34k htto ground at a given point is 80 V, what is the voltage at a point 1.0 m directly west of that point?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A proton moves 0.10 m along the direction ovtyml 6-k5qr4f an electric field of magnitude 3.0 V/m. What is the change in kinetic energy of the rqk6y mlt-45v proton?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated pd;oops1 q/mzs :15nn(xljd- by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electropon1q/sm (p z:;ljnd5d 1sox-n arrives at a distance 1.50 m from the positive plate, what is the potential difference between the initial and final points?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, se.dfe;3t-mm(9gi bgko parated by 0.20 m, are connected to a 12-V battery. An electron released from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.0md ekg9tfo- 3b; .(igm50 m from the positive plate, how much kinetic energy does the electron gain?

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two parallel plates, separated b e8spqgxk 3z)/y 0.20 m, are connected to a 12-V battery. An electron releasek/3) qgx8z sped from rest at a location 0.10 m from the negative plate. When the electron arrives at a distance 0.050 m from the positive plate, what is the speed of the electron?

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C 8fmaye 1p( l3inb8kod;*wnq/directed toward the east. If the voltage measured relative to ground at a given point in the field is 80 V, what is the voltayo1i 8p*bnmd(8;q awk3 eln/f ge at a point 1.0 m directly east of the point?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a uniform electric field of 50 N/C directed toward the easb tjb)o- ;)4lovmnz igc9: (pyt. If the voltaggt b)op l( i:c4bjo9zv-);ymne measured relative to ground at a given point in the field is 80 V, what is the voltage at a point 1.0 m directly south of that point?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a Cu2+ ion drops through a potential difference of 12 V, it will ace +8k11 cdc 0soz*cloequire a kinetic energy (ine0slodoc cz+ 811c*ek the absence of friction) of

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50#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the potential at gd0+chz:1pz ra distance of $5.0 \times 10^{-10} \; m$ from a nucleus of charge +50e?

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two 3.00-mC charges are at the ends of a meter j.y.qc)epc1i stick. Find the electrical potential for the )cpcj q. .1ieycenter of the meter stick.

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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potet3 6ftus(ie 7 vt-s9ivntial is taken to fs6u3si ttiev(-97t vbe zero at infinity, what is the electric potential at point (0, 4.0 m)?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0) and a -2.0-nC charge is a:.7 :()cyxkzjzra ivvar*mg2t (3.0 m, 0). If the potential is taken to be zero at infinity, whryzzr : *2i.c7:mk(a vaxj )gvat is the electric potential energy of a 1.0-nC charge at point (0, 4.0 m)?

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 5.0-nC charge is at (0, 0)qq) jtpvr:tlsz;xd9 5+5bp2h and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, what is the work required to bring a 1.0-nC charge from infinity to point (0, 4.0 m5lv r+px )2;9:5bqtdsqztp jh)?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Four charges of equal ch8 +)gd, roaw,3bwrozmarge +q are placed at the corners of a rectangle of sides a and b. Wha )ad , brm3wzroo,8+gwt is the potential at the center of the rectangle if q = 2.0 mC, a = 3.0 cm, and b = 4.0 cm?

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A square is 1.0 m on a side. Charges of +4.0 mC are placed in two diagonally og(*-f/bwtx svpposite corners. In the other two corners are placed charges of +3.0 mC and -3.0 mC. What is (/bwvx-*tsg f the absolute potential in the square's center?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An alpha particle (charge +2e, 85 1 cwzq:ilhg38ptpp hy,zq.mass $6.64 \times 10^{-27} \; kg$) moves head-on at a fixed gold nucleus (charge +79e). If the distance of closest approach is $2.0 \times 10^{-10} \; m$, what was the initial speed of the alpha particle?

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58#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much energy is necessary to t7ngq: *9fuf(a)ptfnb:( isg place three charges, each of 2.0 mC, at the corners of an equilateral trian f 9ian)( ffntg*b(s7g:q :tupgle of side 2.0 cm?

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What charge appears on the plates of a 2.0-mF car sbn r,dkje6xp4 rn536w1k3v pacitor when it is charged to 100 V?3r5db1v3 kp46j 6nrxrswk e,n

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has k/d;1q+sj2+q p)r tdn cakzcnwi0 : 8splates of area $0.50 \; m^{2}$ separated by a distance of 2.0 mm. What is this capacitor's capacitance?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is filled with air, and the plates an72tol 59 1cl5pahgv yre separated by 0.050 mm. If the capacitance is 17.3 pF, what is5gnlc9 tvphoa 5 l27y1 the plate area?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has 4j.5l 1i*hwx/ri lygk plates of area $0.20 \; m^{2}$ separated by a distance of 1.0 mm. What is the strength of the electric field between these plates when this capacitor is connected to a 6.0-V battery?

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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor has a plate separation of 5.0 cm. If the potential 3z f-zoa8 oob-difference between the plates is 2000 V, with thea-3zfo -o 8obz top plate at the higher potential, what is the electric field between the plates?

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 6.0-mF air capacitor is connectedft zri8xf ne)3-q *8ko across a 100-V battery. After the battery fully charges the capacitor, the capacitor is immersed in transformer oil (dielectric constant = 4.5). How much additional charge flows from the battery, which remained connected during the fixe3*tqr88kn- z)foprocess?

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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 60 mC is placed on a 15 mF capacitor. How much energy is storz5uk2q 39d uxrckcz(2ed in the z 5kcx3( ud 2q9u2rczkcapacitor?

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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  20 V is placed across a 15 mF capacitor. What is thrii4ldli1hw x:a .. o:e energy stored in the capacitorlixr::.1 oih w aid4l.?

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A charge of 2.00 mC flows onto the pl x3k -yp2cxzq :t+ec;cates of a capacitor when it is connected to a 1-;ykc3 e pxz:+cx2 qct2.0-V battery. How much work was done in charging this capacitor?

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If a 10-mF capacitor idoyoi 8iw* b(7jkxvb0 q -a eeil0.j98s charged so that it stores $2.0 \times 10^{-3} \; J$ of energy, what is the voltage across it?

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consists of plates ofdi 7j dq5vq77l,l8v sk area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the capacitance?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor conh r3z(d,/uoc i;pwp ;ufp*y9ksists of plates of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the charge on the plates?

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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor consistpkuxpv( + o:6gs of plates of area $1.5 \times 10^{-4} \; m^{2}$ and separated by 1.0 mm. The capacitor is connected to a 12-V battery. What is the electric field between the plates?

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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capacitor is jft a;lw k:8k)constructed with plate area of $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much charge is stored on it when it is charged to a potential difference of 12 V?

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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A parallel-plate capcy2gwhlxl k8ud:) c9a q5x,z)d2e/b wacitor is constructed with plate area of $0.40 \; m^{2}$ and a plate separation of 0.10 mm. How much energy is stored when it is charged to a potential difference of 12 V?

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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected to a 50-V battery and bejo jqp86ly0 -cb 9eh6hcomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the diele-qcp eh09jl68obh6j yctric has a dielectric constant of 5.0, what is the capacitance of the capacitor after the slab is inserted?

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75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 15-mF capacitor is connected tonyk 0* ,pw*;s vxhtoi2 a 50-V battery and becomes fully charged. The battery is removed and a slab of dielectric that completely fills the space between the plates is inserted. If the dielectric has a dielectric constant of 5.0, what is the voltage across the capacitor's platesspw*x2vi0n okh;*t, y after the slab is inserted?

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